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-rw-r--r--arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c24
1 files changed, 9 insertions, 15 deletions
diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
index 9d3af38..3e3cd3d 100644
--- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -153,7 +153,8 @@ struct drv_cmd {
u32 val;
};
-static long do_drv_read(void *_cmd)
+/* Called via smp_call_function_single(), on the target CPU */
+static void do_drv_read(void *_cmd)
{
struct drv_cmd *cmd = _cmd;
u32 h;
@@ -170,10 +171,10 @@ static long do_drv_read(void *_cmd)
default:
break;
}
- return 0;
}
-static long do_drv_write(void *_cmd)
+/* Called via smp_call_function_many(), on the target CPUs */
+static void do_drv_write(void *_cmd)
{
struct drv_cmd *cmd = _cmd;
u32 lo, hi;
@@ -192,23 +193,18 @@ static long do_drv_write(void *_cmd)
default:
break;
}
- return 0;
}
static void drv_read(struct drv_cmd *cmd)
{
cmd->val = 0;
- work_on_cpu(cpumask_any(cmd->mask), do_drv_read, cmd);
+ smp_call_function_single(cpumask_any(cmd->mask), do_drv_read, cmd, 1);
}
static void drv_write(struct drv_cmd *cmd)
{
- unsigned int i;
-
- for_each_cpu(i, cmd->mask) {
- work_on_cpu(i, do_drv_write, cmd);
- }
+ smp_call_function_many(cmd->mask, do_drv_write, cmd, 1);
}
static u32 get_cur_val(const struct cpumask *mask)
@@ -252,15 +248,13 @@ struct perf_pair {
} aperf, mperf;
};
-
-static long read_measured_perf_ctrs(void *_cur)
+/* Called via smp_call_function_single(), on the target CPU */
+static void read_measured_perf_ctrs(void *_cur)
{
struct perf_pair *cur = _cur;
rdmsr(MSR_IA32_APERF, cur->aperf.split.lo, cur->aperf.split.hi);
rdmsr(MSR_IA32_MPERF, cur->mperf.split.lo, cur->mperf.split.hi);
-
- return 0;
}
/*
@@ -283,7 +277,7 @@ static unsigned int get_measured_perf(struct cpufreq_policy *policy,
unsigned int perf_percent;
unsigned int retval;
- if (!work_on_cpu(cpu, read_measured_perf_ctrs, &readin))
+ if (smp_call_function_single(cpu, read_measured_perf_ctrs, &cur, 1))
return 0;
cur.aperf.whole = readin.aperf.whole -
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